What is the main limiting factor in increasing the efficiency of a solar cell?

Name: Problem 6, Chapter 8: Solid State Electronic Devices
Uploaded: 2021-06-23T06:28:37-08:00
Duration: 1 min 48 s
Channel: Ajay Singhal
Description: What is the main limiting factor in increasing the efficiency of a solar cell?

step 1 So in this question we have to tell what do you mean by fill factor fill factor and Conversion e

What is the main limiting factor in increasing the...

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Key Concepts

Semiconductor Bandgap

The semiconductor bandgap is the energy difference between the valence and conduction bands and determines the range of photon energies a solar cell can absorb. This inherent property sets a fundamental limit on efficiency because photons above the bandgap result in excess energy lost as heat, while those below the threshold are not absorbed at all.

Shockley-Queisser Limit

The Shockley-Queisser limit represents the theoretical maximum efficiency of a single-junction solar cell under standard illumination conditions. It accounts for intrinsic loss mechanisms such as thermalization and transmission losses due to the bandgap, establishing a boundary on performance that cannot be surpassed without new photovoltaic concepts.

Thermalization Loss

Thermalization loss occurs when a high-energy photon is absorbed and its excess energy (beyond what is needed to excite an electron across the bandgap) is dissipated as heat. This process is a major contributor to the overall efficiency loss in solar cells, as it reduces the amount of energy converted into usable electrical power.

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